[kSmica]

It sounds like YOU are the horrible driver here. Aside from reducing one's speed in the conditions above there is no reason to significantly lower your speed below the limit. Doing so would cause far more accidents then would be avoided. You have to be afraid of nearly everything on the road to slow your vehicle down merely because its dark out perhaps driving isn't for you. As for me when it rains, snows, and fogs I prefer to increase my speed so I get through it quicker thus I am out of the danger sooner.

jk

Nope, in most countries it's a requirement that you drive at a speed where you can stop in the length of the road where you have visability. It is plain common sense that to do otherwise is asking to have an accident, should anything be in your lane.
I suspect you two are also the sorts of idiots who don't leave enough distance between you and the car in front for an emergency stop, either - 2 second rule for dry conditions, and a bit more for wet or slippery conditions.

As for driving at night, that's when I prefer it, especially for trips, as traffic is light and you can make good progress - most of our roads are 2 lane (one each way) , twisting and unlit. When I was making regular 400 mile overnight runs between home and tech', my car had 80W low beams, which were also on with high beam (100W headlights plus 100W driving Super Oscar Cibies - 560W of overdriven QH - close to 2 million candlepower, IIRC) - at 14.3V they were enough to get flashed from a little over 5km distance. Low beam was good for a couple of hudred metres and would pick up street signs at least double that!

If you feel you must drive too fast in case you get tailgated shows two things, others are at least as stupid and that you should move to the slower lanes.